Figure 3: The scatter diagrams in comparison of CT value and ultrasound GV, CT volume, and pixel size. Ultrasound GVs for to abscissa and CT values for ordinate in the CS group (a) and the CS/nHAC group (b); ultrasound section pixel to abscissa and CT mask volume to ordinate in the CS group (c) and the CS/nHAC group (d); the positive correlations between CT value and GV and between CT volume and pixel size are obvious.